The head of the Transportation Security Administration defended the agency’s controversial “Quiet Skies” surveillance program Wednesday on Capitol Hill, while acknowledging the program had not foiled any terrorist threats or led to any arrests.

The Transportation Security Administration has studied closing its security checkpoints at 150 of the country's smallest airports which would save $115 million per year. However, the critics came out of the woodwork in opposition to the idea before it even became a formal proposal.